
Brían F. O'Byrne
Department: Acting
Biography
Brían Francis O'Byrne (born 16 May 1967) is an Irish actor who works mostly in the United States. He was born in Mullagh, County Cavan. O'Byrne first attracted notice for his performances in the Martin McDonagh plays The Beauty Queen of Leenane (1996) as Pato Dooley (for which he received a Tony Award nomination for Best Featured Actor in a Play) and The Lonesome West (1997). He is known for taking on serious and dramatic roles, such as a serial killer in Frozen (1998) (for which he won a Tony Award) and a priest accused of child molestation in Doubt (2004), for which he received a Tony nomination. O'Byrne also appeared as a priest in the 2004 film Million Dollar Baby. In May 2007, O'Byrne was nominated for a Tony Award for his performance as Alexander Herzen in Tom Stoppard's 2002 trilogy The Coast of Utopia. In 2011, he was nominated for the Primetime Emmy Award for Outstanding Supporting Actor in a Miniseries or a Movie for his performance in Mildred Pierce as Bert Pierce.
Known For

Million Dollar Baby
2004

Bandits
2001

No Reservations
2007

The International
2009

Before the Devil Knows You're Dead
2007

Brooklyn's Finest
2010

Disco Pigs
2001

Bug
2007

An Everlasting Piece
2000

Easy
2003

Intermission
2003

The Grey Zone
2001

The New World
2005

Jimmy's Hall
2014

Queen & Country
2015

Twig
2024

Medeas
2013

Gilded Lilys
2013

The Last Bus Home
1997

Alexander Hamilton
2007

Mapmaker
2001

Sergio
2020

My Salinger Year
2020

The Fifth Province
1997

The Wonder
2022

The Blackwater Lightship
2004

Conclave
2024

Dead of Winter
2025

One Sweet Hour
—

Seahorse
—

Avenue X
1993

Brotherhood
2006

Law & Order: Special Victims Unit
1999

Oz
1997

Hallmark Hall of Fame
1951

FlashForward
2009

Mildred Pierce
2011

Prime Suspect
2011

Aquarius
2015

Saints & Strangers
2015

The Bastard Executioner
2015

Love/Hate
2010

Little Boy Blue
2017

The Magicians
2015

Nightflyers
2018

Amongst Women
1998

Hatton Garden
2019

Manhunt
2017

Lincoln Rhyme: Hunt for the Bone Collector
2020

American Experience
1988

The Last Ship
2014

The Abandons
2025